Pressure-gage.



F. J. MANNING.

PRESSURE GAGE. APPLICATION FILED Auci'.21. 191s.

1,274,921. Patntea Aug. 6, 191a.

IN\/E NTI: EANEIS .JLMANNING A'ITEI 3 Nays rm: mmms PEYERS ca. Pnnmumm.wnsmucmn. n. c.

UNITED STATES PATENT onmcn.

FRANCIS J. MANNING, OF MEDFORD, MASSACHUSETTS, ASSIGNOR, BY- MESNEASSIGN- MENTS, TO AMERICAN STEAM GAUGE & VALVE MANUFACTURING COMPANY, OFBOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS. I

PRESSURE-GAGE.

Specification of Letters Patent.

Patented Aug. c, 1918.

Continuation of application Serial No. 798,198, filed October 30, 1913.This application filed August 2'7, 1915.

Serial No. 47,614.

of Medford, in the county of Middlesex and State of Massachusetts, haveinvented cer-' tain new and useful Improvements in Pressure-Gages, ofwhich the following is a specification.

The present invention relates to pressure gages and has for its objectto provide a simplified means of adjustment for correcting the positionand amplitude of swing of the pointer or hand by which pressures actingupon the gage are indicated on a dial. It is necessary that gages madein quantities according to standard patterns should which form parts ofthe gage.

-.j the spring tube and the pointer or indicator,

be capable of adjustment in order that each individual gage may becorrectly calibrated in connection with the spring or other pressuremeasuring element, and the dial,

These adjustments involve changing the amplitude of movement of thepointer for the same amount of the movement ofthe spring tube or otherpressure measuring element, and

dicator without altering its amplitude of movement. Heretofore theseadjustments have usually been made by means of adjustable links andother connections between involving a plurality of parts'movablerelatively to each other and secured in anladjusted position by meansofclamping screws or equivalent elements. That is, the means. i heretoforeusually'employed for securing the adjustments indicated abovenecessitated many parts additional. to what would have been sufficientif it were notv for the neces sity of providing an adjustment.

v The object of the present invention is to. produce a constructionwhich. will enable the adjustments above indicated to be made, withoutnecessitating the use of any more parts than would berequiredif noadjust.-

. ments were contemplated. In other words,

my object is to secure complete adjustability in a gage with no moreparts than would be required simply to perform indicating functions in anon-adjustable gage.

The present invention was first described and claimed in an applicationfiled by me October 30, 1913, Serial Number 798,198 of which applicationthe presentis a continuation. The, precise nature of the invention andthemeans by which it is carried into efl'ect appear from the followingdescription, in connection with the drawings, of a gage embodying thepreferred form of my inventlon. v i g In the drawings,

Figure 1 is a central vertical section of the gage embodying theinvention.

Fig. 2 is a front elevation of the same with parts broken away. I

Fig. 3) is a similar view showing a modification.

The gage as a whole may be ofany or- V dinary or otherconstructiomhaving. a nipple an adapted to be mounted iniany convenientmanner in connection with the pipe or container" for the fluid ofwvhichthe pressure is to be measured. The gage is.

equipped with thenusual spring tube or Bourdon spring 6, whichcommunicates in any ordinary or other desired manner with the nipple soas to receive the fluid under! pressure and to be distorted thereby,with consequent movement of the free endof the spring. 0 representsthedial of the gage and d represents the pointer or indicator thereof. 6represents a link for transmitting movement from theclosed free end ofthe spring to the pointer.

The main feature of the invention consists in the construction of thepointer whereby the adjustmentshfor vamplitude of I which is bendableand non-resilientso that, it may be given a permanent set of suchproportions that the bent part and the curved arm may be bent widely andrepeatedly Without breaking. The indicator is pivoted on a stud j. V

Evidently the distance between thestud j and the pivot 2' is the lengthof lever arm I ofswing, whereby the indicator may beaccnrately located.inthe zero position. g

In the arrangementshown, in "Figs. 1- 2 the stud j is mounted on thedial '0, having a reducedend passing 'ithrougha hole inthe dial andupset or headed over at the back of the dial. The indicator may,howe'verjbe pivoted-on a post or stiid rising from the part to which-thespring tube 18' attached, as shown in =Fig.- 3. -The dial itself ismounted upon a post "7:: which projeetsnmn the back or base portionofthe gage, a tip Z on such post being contained and upset 111 a holeinthe dial. -A small projection-m en the-part to which the spring t'ube isattac'hed is similarly fastened in the dial "to hold the latter fromrotating. In thisw-ay the dial is securely held. without theuse ofscrews'or separaterivets.

* The "connection between the link-and the s 'u'ring tube is"accomplished in: a; simple mannerbya pin n'fixed onthe link and passingfreely into an opening in a head 0 secured to the spring.

' The gage ha ving the above features possesses the followingadvantages, among others. First, all of the adjustments necessary' tomakethe gage accurate can be -made easilya'nd quickly by bending eitherthe arm h or the arm 9 or both arms. "Second,

the'adju'stments are madewithout loosening anyclamps or otherconnections, and when on'ce niade are permanentwithout need of settingup'any'screws Orclamps. Thus there is' no danger of tliegagegettingouto'l adjustment"through failure of the adjuster to tighten upthe connections. Third, thegage, having fewer parts canbe furnished fora lowerprice, because of reduced cost formaterials, and a smaller laborcost resulting from-saving in the'time of assei'nbling the fewer pa'rts0f the-gage, and of time-in adjusting. Fourth, the dial is more secureon account-of not being dependent upon screws to hold it in place.

\Vhat I claim and desire to secure by Letters Patent is:

1. A' gage includinginits construction a dial plate, ;a pointer :orhand, a:rivet con- .Copiesofthismatent maybebbtained for five centseach, "by addressingisthe Was11ingto1i,.D. 0.

- to'the rivet and 'iO- Sl1 i fl3i'l 16 iposition'o'f the pointerrespectively, a base portion having a post projecting therefrom andthrough the dial plate, said-post being "upset. or

headed over at it's endgto' -i'tain the Fdial plate thereon, a Bourdontube m'oilhted upon said base and having a "head prowitletl-withanopening at-its free-end, -aiicla pin .o'r studiigi-dly connected tosaid li'nk and pro; jecting 1 therefrom perpendicularly to .the lengthof the link and contained ifre'ely and r-otatably in said-opehing. I

2. 111 agagefthecombination-"with a peesure actuated member, apivot'ally inoiiiited indicatorhavinginr ar-m Y and anindicating-portion both in the same plane," anda link pivotallyconnected with said arm and with the pressure actuated in ember, saidarm being curved 'or bowed betweenthe pivot] point otthe indicator"and"the-connection with the-link, whereby thedistance-between said pivotpoint and connection"may"be alteredby bending the arm. j r

In a gage'of the charaeter-described, an in'dicatin'g pointer made froma -'sin-gle pieceof metal, "which is bendablennclnonrcsilient soi thatitfm'ay be given a permanent set, having a relatively long pointing arm,a relatively short operating army-amuse -1n-'- termediate portionadapted tobe pivotally mounted, :the operating arm being-curved aroundthe pivoting port-ion and toward the indicating arm, -a'nd"theindicatingarinhaving a bowed -t. aoeiit t0 the .i iirdtiiigv vay from I OP-portion which is eurved crating arm.

i A- pressure gage com 'irisin-g a pres: sure measuring movable element,indicator comprising a *pivotally mounted inchc ating arm having an oflset bowed'part-between its indic'a'ting part and the pivotfand a secondcurvedarm joined to the firs-tarm, and a link pivoted-to said second arm'and connected to said "measuringelement; the

said arms being of we bendable and non-re.

silient metal-'capableofbeing given apermanent set, whereby onemaybe-bent to change the amplitude of nio'vementof the indicatoryand theothermay-be bent to shift the position of the indicator.

-In testimony whereof I have a'fiiXedv my signature.

FRANois J. MANNING.

Commissionrgof .Patents,

